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ELR-4M AC Earth Leakage Relay

Blue Jay ELR-4M AC Earth Leakage Relay
ELR-4M RS485 Earth Leakage Relay
ELR-4M Earth Leakage Relay communication port
din rail ELR-4M Earth Leakage Relay back side

ELR-4M AC Earth Leakage Relay

The ELR-4M AC Earth Leakage Relay is an advanced protection device designed to enhance the safety and reliability of electrical systems. With a residual current transformer (RCT), it continuously monitors the residual current in the busbars or branches of the system. When the residual current exceeds the preset threshold, the relay promptly outputs an alarm signal, ensuring early detection of potential faults.

Equipped with alarm function, the ELR-4M ensures that alarm signals remain clearly indicated until received the reset signal, facilitating easy fault diagnosis and troubleshooting. ELR-4M is critical for preventing equipment damage, minimizing downtime, and safeguarding personnel against electrical hazards.

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Blue Jay ELR-4M AC Earth Leakage Relay
ELR-4M RS485 Earth Leakage Relay
ELR-4M Earth Leakage Relay communication port
din rail ELR-4M Earth Leakage Relay back side

The ELR-4M AC Earth Leakage Relay is an advanced protection device designed to enhance the safety and reliability of electrical systems. With a residual current transformer (RCT), it continuously monitors the residual current in the busbars or branches of the system. When the residual current exceeds the preset threshold, the relay promptly outputs an alarm signal, ensuring early detection of potential faults.

Equipped with alarm function, the ELR-4M ensures that alarm signals remain clearly indicated until received the reset signal, facilitating easy fault diagnosis and troubleshooting. ELR-4M is critical for preventing equipment damage, minimizing downtime, and safeguarding personnel against electrical hazards.

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Feature

  • Isolated auxiliary power supply;
  • 2XSPDT relay outputs;
  • Remote test/rest connections;
  • Standard 35mm din rail mounting;
  • RS485 modbus communication;
  • Adjustable trip levels and time delay.

Specification

Parameter Value
Auxiliary power supply 85-265Vac/dc
Power consumption ≤4VA
Frequency 50/60Hz, Accuracy ±0.01Hz
Leakage current alarm threshold 6mA-60A, can set as need.
Time delay 50ms-10sec, can set as need.
Communication RS-485 MODBUS-RTU
Display LCD with backlit
Withstand voltage 2.5KV 1min
Insulation Input, output, power supply to shell >5MΩ
Storage environment -40~70°C
Working environment -25~55°C Altitude ≤2500m,

0~95%RH, non-condensing, non-corrosive gas

Application

  • Smart grid system;
  • Medium and low voltage systems;
  • Commercial and residential buildings;
  • Utilities and power distribution systems;
  • Motor control panels and switchboards;
  • Industrial control system (PLC, SCADA, DCS).

Wiring method

Dimension

Dimension: 78*90*60 mm W*H*D 

Front view                                                                                                                          

 

Side view

Download

ELR-4M User manual-V1.10

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Chongqing Blue Jay Technology Co., Ltd. was founded by engineers with many years of experience. Focuses on the development, production and sales of power automation monitoring products and energy metering instruments.

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Jiangyin High-tech Zone, Jiangyin City, China